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2.1.2a Particle structure and motion in solids, liquids and gases

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Question 40

Tiny smoke particles are suspended in a closed glass cell containing air. A bright beam of light is shone into the cell from the side.

Looking through a microscope from above, small bright specks of light are seen to move in a continuous, random, and jerky manner.

What are these moving specks of light?

A

air molecules being bombarded by other air molecules

B

air molecules being bombarded by smoke particles

C

smoke particles being bombarded by air molecules

D

smoke particles being bombarded by other smoke particles

Markscheme

2.1.2a Particle structure and motion in solids, liquids and gases Questions

  1. IGCSE
  2. /Physics
  3. /2.1.2a Particle structure and motion in solids, liquids and gases

151 exam-style questions on CIE IGCSE Physics 2.1.2a Particle structure and motion in solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.

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